Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. An Organic Light Emitting Diode (OLED) touch display panel, comprising: a Thin Film Transistor (TFT) array substrate, comprising: an active layer; a gate insulation layer covering the active layer; a gate line layer disposed on the gate insulation layer; an inter-layer insulation layer covering the gate line layer and the gate insulation layer; a data line layer disposed on the inter-layer insulation layer; and a planarizing layer covering the data line layer; wherein the gate line layer comprises a gate line and a gate electrode, the data line layer comprises a data line, a source electrode and a drain electrode, the gate line extends along a first direction, and the data line extends along a second direction intersecting with the first direction; an OLED element formed on the TFT array substrate and comprising an upper electrode, a lower electrode and an organic layer between the upper electrode and the lower electrode, wherein the lower electrode is electrically connected with the source electrode or the drain electrode via a first contact hole in the planarizing layer; a first touch line extending along the first direction and disposed in the same layer with the gate line; a second touch line extending along the second direction, intersecting with the first touch line and disposed in the same layer with the data line; and a touch sensing electrode disposed in the same layer with the lower electrode of the OLED element, spaced from the lower electrode and electrically connected with the second touch line via a second contact hole in the planarizing layer.
The OLED touch display panel combines display and touch sensing functionalities. It consists of a TFT substrate with an active layer, gate insulation, gate lines (running in a first direction), interlayer insulation, and data lines (running in a second direction, intersecting the gate lines). An OLED element, having an upper electrode, lower electrode, and organic layer, is formed on this substrate. The lower OLED electrode connects to a source or drain electrode via a contact hole. A first touch line runs parallel to the gate lines and is made from the same layer. A second touch line runs parallel to the data lines, intersecting the first touch line and uses the same layer. A touch sensing electrode, in the same layer as the lower OLED electrode, is positioned separately from the lower electrode, and connects to the second touch line via a contact hole.
2. The OLED touch display panel according to claim 1 , wherein the lower electrode of the OLED element comprises a bottom transparent conductive layer, a top transparent conductive layer, and a reflective layer between the bottom transparent conductive layer and the top transparent conductive layer, and the touch sensing electrode is disposed in the same layer with the bottom transparent conductive layer.
The OLED touch display panel, as described above, incorporates a specific structure for its lower OLED electrode. The lower electrode comprises a bottom transparent conductive layer, a top transparent conductive layer, and a reflective layer sandwiched between them. The touch sensing electrode is located in the same layer as the bottom transparent conductive layer. This layered structure aims to improve light output and touch sensitivity.
3. The OLED touch display panel according to claim 2 , wherein the touch sensing electrode and the bottom transparent conductive layer are formed of the same material.
Building on the previous OLED touch display panel structure, the touch sensing electrode and the bottom transparent conductive layer of the lower OLED electrode are made from the same material. This simplifies manufacturing and potentially improves the electrical characteristics between the touch sensing electrode and the lower electrode, enhancing touch detection accuracy.
4. The OLED touch display panel according to claim 3 , wherein the lower electrode of the OLED element comprises an ITO/Ag/ITO structure.
In the OLED touch display panel design detailed in the preceding claims, the lower electrode of the OLED element employs an ITO/Ag/ITO (Indium Tin Oxide/Silver/Indium Tin Oxide) structure. This layered configuration of transparent conductive oxides and a reflective metal (silver) optimizes the light extraction efficiency and reflectivity of the OLED, contributing to better display performance.
5. The OLED touch display panel according to claim 1 , wherein the first touch line and the gate line layer are formed of the same material.
The OLED touch display panel architecture described earlier has the first touch line and the gate line made of the same material. By using the same material for both, the manufacturing process can be simplified, potentially reducing costs and improving yield without affecting the electrical characteristics.
6. The OLED touch display panel according to claim 5 , wherein the second touch line and the data line layer are formed of the same material.
The OLED touch display panel previously explained is enhanced by using the same material for the second touch line and the data line. This simplifies the manufacturing process, reducing cost and improving yield, since only one material needs to be deposited and patterned for both functionalities.
7. The OLED touch display panel according to claim 1 , wherein the first touch line comprises at least one first touch electrode, each of which has a width greater than a width of rest of the first touch line.
The OLED touch display panel, as previously described, includes a first touch line with at least one widened segment, forming a first touch electrode. Each of these first touch electrodes has a width greater than the rest of the first touch line. These wider sections likely serve to increase the sensitivity or signal strength of the touch sensing in these specific areas.
8. The OLED touch display panel according to claim 7 , wherein the second touch line comprises at least one second touch electrode, each of which has a width greater than a width of rest of the second touch line.
The OLED touch display panel, as previously described, builds upon the idea of wider touch electrodes. The second touch line also includes at least one widened segment, creating a second touch electrode. Similar to the first touch electrode, each of these second touch electrodes has a width larger than the remaining part of the second touch line, presumably to enhance touch sensitivity in certain areas.
9. The OLED touch display panel according to claim 1 , wherein the first touch line and the second touch line respectively have an increased width at an intersection of the first touch line and the second touch line.
The OLED touch display panel described earlier has an increased width of both the first and second touch lines at their intersection points. This widening likely reduces resistance at the intersection, improving the reliability and accuracy of touch sensing by ensuring a stronger signal at these critical points.
10. The OLED touch display panel according to claim 5 , wherein the first touch line and/or the second touch line is formed of any one of Mo, Al, Ag, Au and Ti, or an alloy composed of at least two of them.
For the OLED touch display panel where the first touch line and the gate line are made of the same material, the first touch line and/or the second touch line can be composed of Molybdenum (Mo), Aluminum (Al), Silver (Ag), Gold (Au), and Titanium (Ti), or an alloy made from at least two of these metals. This material choice focuses on conductivity and process compatibility.
11. The OLED touch display panel according to claim 6 , wherein the first touch line and/or the second touch line is formed of any one of Mo, Al, Ag, Au and Ti, or an alloy composed of at least two of them.
For the OLED touch display panel where the second touch line and the data line are of the same material, the first touch line and/or the second touch line can be composed of Molybdenum (Mo), Aluminum (Al), Silver (Ag), Gold (Au), and Titanium (Ti), or an alloy made from at least two of these metals. This material choice balances electrical conductivity and ease of manufacturing.
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October 31, 2017
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